TK has combined a PIR with an Arduino to create a smart safety light for the house or workshop. Follow along as this gets built out into a more extensive project.

[mircemk] shows how to create a simple non-contact proximity sensor using little more than an Arduino Nano board, and a convenient software library intended to measure the value of capacitors. The … ...

The MS600 uses a combination of the super-precise radar tech, PIR, and light sensors to detect small movements, such as breathing, as well as general motion and light levels.